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Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation
Published on: October 1, 2019
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Pseudohalides in Lead-Based Perovskite Semiconductors.
Bright Walker1, Gi-Hwan Kim2, Jin Young Kim3
1Department of Chemistry, Kyung Hee University, Seoul, 02447, South Korea.
Advanced Materials (Deerfield Beach, Fla.)
|February 1, 2019
Summary
This study explores using pseudohalide anions, beyond traditional halides, to create novel lead halide perovskite (LHP) semiconductors. Discovering new anions could unlock advanced optoelectronic properties and material characteristics.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Optoelectronics
Background:
- Lead halide perovskites (LHPs) are promising semiconductors due to their low cost, ease of preparation, and excellent optoelectronic properties.
- The halide (X) composition in the general ABX3 formula is crucial for tuning LHP characteristics like bandgap and morphology.
Purpose of the Study:
- To investigate the potential of using polyatomic pseudohalide anions in LHP semiconductors.
- To expand the scope of anion engineering in perovskite materials beyond traditional halides.
Main Methods:
- Exploration of the prospect of using polyatomic pseudohalide anions in LHP semiconductors.
- Analysis of the general ABX3 stoichiometry with Pb2+ and -1 charged pseudohalides.
Main Results:
- The study addresses the open question of whether polyatomic pseudohalides can form semiconducting perovskite crystal phases with Pb2+.
- Identifies pseudohalides as a potential avenue for discovering new LHP materials.
Conclusions:
- While halide composition is a known tuning parameter, the use of pseudohalides in LHPs remains underexplored.
- Further research into pseudohalide anions could lead to novel LHP semiconductors with tailored properties.
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